Water Filters

Look for an absolute (not nominal) filtration rating of 1 micron or below. NSF/ANSI 53 certifies pitcher and under-sink filters; NSF/ANSI 58 covers reverse osmosis systems, which provide the highest reduction rates (99%+ for particles).

Affiliate disclosure. Some links on this page may earn a commission at no cost to you. We only list products we have independently assessed. Where a listing makes a microplastic-reduction claim, we link to the third-party test data; if none is available, we say so.

water filters

Big Berkey Gravity Filter

Gravity-fed countertop system. Black Berkey filters carry independent lab data on particulate reduction; check current spec sheet for microplastic-relevant claims.

No independent test data availableView Big Berkey Gravity Filter details →

water filters

Clearly Filtered Pitcher

NSF/ANSI 53-tested pitcher filter marketed for microplastic reduction. Manufacturer publishes third-party lab reports — verify the latest before purchasing.

View test report ↗View Clearly Filtered Pitcher details →

water filters

AquaTru Countertop RO

Countertop reverse osmosis system. RO architecture removes the overwhelming majority of particles down to nanoplastic scale; look for NSF/ANSI 58 certification.

No independent test data availableView AquaTru Countertop RO details →

water filters

Under-sink Reverse Osmosis (generic)

Permanent under-sink RO systems are the highest-evidence option for particle reduction. Look for NSF/ANSI 58 certified models from established brands.

No independent test data availableView Under-sink Reverse Osmosis (generic) details →